Random controls on semi-rhythmic spacing of pools and riffles in construction-dominated rivers

Auteur :
THOMPSON, D.M.

Description :
A simulation model for pool and riffle formation is used to demonstrate that semi-rhythmic spacing of pools with an approximate spacing of 5 to 7 bankfull widths can be recreated from a random distribution of obstructions and minimum pool- and riffle-length criteria. It is assumed that a pool-riffle couplet will achieve a minimum length based on dominant-discharge conditions. Values for the minimum-length assumption are based on field data collected in New England and California, while the theoretical basis relies on the demonstrated hydraulic response of individual pools to elongation. Discussion of the results.


Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 2001, vol. 26, n°. 11, p. 1195-1212, nombre de pages : 18, Collation : Illustration, Références bibliographiques : 34 ref.

Date :
2001

Editeur :
Pays édition : Royaume-Uni, Chichester, Wiley